A projection apparatus is provided. The projection apparatus may be used in a device like a vehicle light, a projector, or a head-up display apparatus, and has a projection or illumination function. The projection apparatus includes a three-primary-color light source (110), a collimation component (120), a spatial light modulator component (130), and a projection lens (140). The three-primary-color light source (110) is configured to send a three-primary-color light beam to the collimation component (120). The three-primary-color light beam includes red light (R), green light (G), and blue light (B). The collimation component (120) collimates the three-primary-color light beam, and sends the collimated three-primary-color light beam to the spatial light modulator component (130). Then, the spatial light modulator component (130) performs phase modulation on received three-primary-color light beam, and converges modulated light beams on a focal plane of the projection lens (140), to form a to-be-projected hologram (CGH). The projection lens (140) projects the to-be-projected hologram (CGH). The projection apparatus can implement matching of a plurality of light types with lower costs, a smaller size, and higher efficiency.
PROJECTION DEVICE, VEHICLE LAMP AND VEHICLE
PROJEKTIONSVORRICHTUNG, FAHRZEUGLAMPE UND FAHRZEUG
DISPOSITIF DE PROJECTION, PHARE DE VÉHICULE ET VÉHICULE
2025-03-12
Patent
Electronic Resource
English
IPC: | G03H Holografische Verfahren oder Vorrichtungen , HOLOGRAPHIC PROCESSES OR APPARATUS / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES / G03B APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM , Geräte oder Anordnungen zum Aufnehmen, Projizieren oder Betrachten von Fotografien |
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